These are the most popular: https://www.google.com/url?sa=t&source=web&rct=j&ei=OSsRVKjwJY2dyATkpoDYDw&url=http://priuschat.com/threads/philips-daylightguide-daytime-running-light.134008/%23axzz39koICXpJ&cd=1&ved=0CB0QFjAA&usg=AFQjCNH4jwzK5UveByDuTUlbIoV1C_SXqg SCH-I535
I went with an aftermarket DRL module that powers the highbeam bulbs at 30% power for an oem look. Link in my signature below. SCH-I535